Kunchur MN, Ivlev BI, Christen DK, Phillips JM
Department of Physics and Astronomy, University of South Carolina, Columbia, South Carolina 29208, USA.
Phys Rev Lett. 2000 May 29;84(22):5204-7. doi: 10.1103/PhysRevLett.84.5204.
Flux flow was studied over an entire temperature range down to T approximately 2% of T(c) by using intense pulsed current densities to overcome flux-vortex pinning. The resistivity at high vortex velocities is proportional to B and roughly follows rho approximately rho(n)B/H(c2), with a prefactor of order unity. Contrary to some speculation, rho(n) saturates to a finite residual value as T-->0, indicating a metallic (rho-->finite) rather than insulating (rho-->infinity) normal state, and the vortex dissipation continues to be conventional as T-->0.
通过使用强脉冲电流密度来克服磁通-涡旋钉扎，在直至约为Tc的2%的整个温度范围内研究了磁通流。在高涡旋速度下的电阻率与B成正比，大致遵循ρ≈ρ(n)B/H(c2)，系数为单位量级。与一些推测相反，当T→0时，ρ(n)饱和到一个有限的残余值，表明正常态是金属性的（ρ→有限值）而非绝缘性的（ρ→无穷大），并且当T→0时涡旋耗散仍然是常规的。
